When I add a nav menu for example to a section, and this

When I add a nav menu for example to a section, and this happened to me in the demo and now on my own hosted site, the site pauses and most things are grayed out, including the dialog box that is asking me which menu I want to choose. This has been frustrating to say the least. It makes me think there is another dialog box I am missing but I can't find it anywhere. Usually about 45 seconds of clicking around trying to figure it out, the option to choose a menu finally becomes available. Am I just supposed to wait?

Also I searched your tutorial videos for Upfront and got nothing. Are there really no video tutorials?

Thank you! I was hoping this would be the end all to end all theme searches... fingers still crossed...